: Rectangular supply duct mitered elbow with turning vanes. CD-T4 : Round common return/exhaust duct tee. Engineering Benefits of Version 6.00.05
: Input the volumetric airflow rate (CFM or L/s) for each branch of the fitting.
: Increased limits for parameters like width, height, and length on several common fittings, including Why It Matters for Your Projects ASHRAE Duct Fitting Database provides loss coefficient tables for over 200 round, rectangular, and flat oval fittings . Using this software allows you to: Calculate External Static Pressure (ESP)
Historically, some designers relied on static friction charts or arbitrary "rules of thumb" (such as assuming a flat 0.1 inches of water column loss per 100 feet for the entire run, including fittings). This practice leads to two critical errors: ashrae duct fitting database version. 6.00.05
: When installing, ensure all other programs are closed and your Adobe Acrobat Reader is up to date to view the built-in PDF loss coefficient reports. ESP calculation using a specific fitting from this database? Duct Fitting Database - ASHRAE
The software displays the calculated local loss coefficient ( ). It also provides the specific air density ( ), velocity ( ), and individual fitting pressure drop ( Why Version 6.00.05 Matters for Compliance
User-Friendly InterfaceThe interface allows for quick navigation through the fitting categories. Users can input specific variables like velocity, air density, and fitting dimensions (such as turning radius or angle) to see real-time updates to the loss results. : Rectangular supply duct mitered elbow with turning vanes
A notable discussion on the Autodesk forums highlights the industry’s reliance on this integration. While Revit 2019 was found to be integrated with an older version (5.00.00) of the DFDB, users were actively requesting an update to version 6.00.05. This gap underscores a common industry challenge: keeping BIM software synchronized with the latest engineering databases. Revit MEP uses the ASHRAE database to automatically lookup coefficients for determining pressure losses through duct fittings. A discrepancy between the version in Revit and the current industry standard can lead to inconsistencies in project calculations.
Open the database and navigate the tree structure. For example, to find a rectangular pleated elbow, navigate to: Rectangular Fittings > Elbows > Pleated . Step 3: Input Geometric and Flow Ratios
Quick calculations for converging, diverging, and straight-through airflow patterns. : Increased limits for parameters like width, height,
: Locate the specific fitting code in the database that matches the layout geometry.
The current version of the database is 6.00.05, which was released to provide updated and expanded data on duct fittings. This version includes:
By replacing guesswork with verified, test-backed data and streamlining complex calculations, the DFDB empowers engineers to design more efficient, cost-effective, and reliable air distribution systems. In an industry where precision is paramount, version 6.00.05 is not just a reference—it's a smart, integrated solution for modern HVAC design.